In a sneak preview from Lifetime's forthcoming reality series, "The Houstons: On Our Own," the 19-year-old nervously tells her family members she is "engaged" to Nick Gordon. (Whitney Houston informally adopted Gordon when he was 12 years old; the singer passed away suddenly in Beverly Hills, Calif., on Feb. 11, 2012.)

Bobbi Kristina has yet to address the rumored engagement herself via Twitter, but she continued to fuel rumors when she and Gordon attended "We Will Always Love You: A Grammy Salute to Whitney Houston" at the Nokia Theatre in Los Angeles on Oct. 11. Rocking a red mini-dress, Bobbi Kristina wore an exceptionally large diamond ring on her engagement finger.

Though the couple is still together, the status of their relationship is unclear. Brown's aunt, Pat Houston, recently described their relationship as a "very, very strong friendship," in an interview with ABC News.

"A lot of teenagers, when they hit 18, they think they're grown," Pat explained. "They think they know it all -- they think they know about relationships. You just have to be there to navigate and guide them. You have to hope that their feelings will not get hurt, but they will."

"The Houstons: On Our Own" premieres on Oct. 24 at 9 p.m. EST on Lifetime.